Portable door lock



FIG. 1 is a front elevational view of a portable door lock showing my new design;

FIG. 2 is a rear elevational view thereof;and

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a portable door lock showing my new design; and,

FIG. 8 is another perspective view thereof. 

CLAIM The ornamental design for a portable door lock, as shown and described. 